Multi-digit fluorescent display tube with inclined filament cath

Details Multi-digit fluorescent display tube with inclined filament cath Multi-digit fluorescent display tube with inclined filament cath

1976-05-25

1977-09-20

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

313302, 313343, 313294, H01J 1908, H01J 1942, H01J 6306

Patent

active

040499936

ABSTRACT:
A multi-digit fluorescent display tube comprising a multi-digit pattern display member including display units for respective digits disposed in parallel and composed of segment anodes, each segment anode having a phosphor layer, and at least one cathode stretched along the longitudinal direction of the pattern display member to confront the respective multi-digit pattern display units in common, wherein the cathode is disposed in an inclined manner and the perveance in each display unit is adjusted, so that when the cathode is heated and actuated by a direct current power source, the display brightness is substantially uniform in the display units for respective digits.

REFERENCES:
patent: 2048232 (1936-07-01), Snow
patent: 2887610 (1959-05-01), Smith
patent: 3136911 (1964-06-01), Crawford et al.
patent: 3958150 (1976-05-01), Kobayakawa et al.

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